Jumpy Velocity/Playback Rate

I have searched all over the internet and found no solution and no evidence that anyone else has experienced this issue.

The issue is that whenever speeding up a video clip, it becomes jumpy and pulses about once ever 1/2 second. This happens when I do the ctrl+drag, velocity envelope, and entering in a value in the playback rate section of clip properties. It is especially noticeable when the camera is panning.